Display And Keypad; Service Interface; Relay Board (Option) - TESTO 6681 Profibus Instruction Manual

Probe Article no.
testo 6615 0555 6610-L15
testo 6617 0555 6610-L17

1.2.3 Display and keypad

The display option allows the testo 6681 humidity transmitter to be operated
via the display and four keys.
The LCD display consists of two 7-segment lines for displaying readings and
units and of an information line (for status messages, for example).
The brightness and contrast of the display and the background lighting
(permanent or off) can be changed via the user menu or the P2A software.

1.2.4 Service interface

Behind the service flap is the parameterizing socket (mini-DIN) as an
interface to the P2A software or Testo handheld instrument
(testo 400/testo 650).

1.2.5 Relay board (option)

This has a floating switch capacity of 250 V AC/3 A. The switching limits and
hysteresis can be set via the display or the P2A software or via the Profibus.
Further features include:
Function of changeover contacts (NC/NO contacts) freely selectable
12 terminals for a total of 4 relays.
If no relays are available, settings for monitoring limit values
or alarms can still be controlled via the display. The alarm
status will be shown on the display.
Only have the transmitter wired and connected by authorized
personnel with the voltage disconnected.
testo 6681 Profibus
Characteristic
Trace humidity cable probe version;
accuracy ± 6 K at -60 °Ctd;
temperature range -40 °C to +120 °C/-40 to
+248 °F, sensor soldered
Cable with cover electrode monitoring probe
version; accuracy to ± 1.2 % RH; temperature range
-40 °C to +180 °C/-40 to +356 °F, sensor soldered
- 1.2 Product description 15